973966221 has 16 divisors (see below), whose sum is σ = 1443568320. Its totient is φ = 649015920.

The previous prime is 973966181. The next prime is 973966223. The reversal of 973966221 is 122669379.

It is a happy number.

973966221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 973966221 - 2⁹ = 973965709 is a prime.

It is a super-2 number, since 2×973966221² = 1897220399298041682, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (973966223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63886 + ... + 77648.

It is an arithmetic number, because the mean of its divisors is an integer number (90223020).

Almost surely, 2^973966221 is an apocalyptic number.

It is an amenable number.

973966221 is a deficient number, since it is larger than the sum of its proper divisors (469602099).

973966221 is a wasteful number, since it uses less digits than its factorization.

973966221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16393 (or 16387 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 973966221 is about 31208.4318894750. The cubic root of 973966221 is about 991.2456588169.

The spelling of 973966221 in words is "nine hundred seventy-three million, nine hundred sixty-six thousand, two hundred twenty-one".